View Compilation Error

0_0_38826673_1524.cpp: In function 'void bfs(int, int)':
0_0_38826673_1524.cpp:26:6: error: 'class std::priority_queue<node>' has no member named 'front'
   26 | t=qu.front();
      |      ^~~~~
0_0_38826673_1524.cpp: At global scope:
0_0_38826673_1524.cpp:72:1: error: expected declaration before '}' token
   72 | }
      | ^
0_0_38826673_1524.cpp:73:1: error: expected declaration before '}' token
   73 | };
      | ^